80004400040 has 32 divisors (see below), whose sum is σ = 180342684360. Its totient is φ = 31942598400.

The previous prime is 80004399971. The next prime is 80004400097. The reversal of 80004400040 is 4000440008.

It can be written as a sum of positive squares in 4 ways, for example, as 68498405284 + 11505994756 = 261722^2 + 107266^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 80004399985 and 80004400021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1826891 + ... + 1870170.

Almost surely, 2^80004400040 is an apocalyptic number.

It is an amenable number.

80004400040 is an abundant number, since it is smaller than the sum of its proper divisors (100338284320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80004400040 is a wasteful number, since it uses less digits than its factorization.

80004400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697613 (or 3697609 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 80004400040 its reverse (4000440008), we get a palindrome (84004840048).

The spelling of 80004400040 in words is "eighty billion, four million, four hundred thousand, forty".